Coil-end support



R.-B. WILLIAMSON.

COIL END SUPPORT. 7

APPLICATION men 0018. 1914.

1,331,970." 1 Patented Feb. 24,1920.

' UNITED STATES PATENT OFFICE. ROBERT B. WILLIAMSON, OF lVIILWAUKEE, WISCONSIN, ASSIGNOR TO ALLIS-C {HALMERS MANUFACTURIN COMPANY .OF MILWAUKEE, WISCONSIN, A CORPORATION OF DELAWARE.

To all whom it may concern: Be it known that I, ROBERT B. filmm- SON, a citizen ofthe United States, residing I at Milwaukee, in the county of Milwaukee and State of Wisconsin, have mvented a certam new and useful Improvement 1n (Joll- End Supports, of which the following is a specification. V

This invention relates in general to dynamo-electric machines, and has particular I'QlfliJlOIlfiO devices for holding the projecting end portions of coils of such machines in fixed position. i

Thesecuring in position of the projecting portions of coils of dynamo-electric machines of considerable size is a matter of considerable moment; and, in connection with large size alternators, the design of proper means for securing and holding the projecting end portions oi the coils of a stationary armature receives considerable attention. It will be apparent that the portions of the coils that are disposed within the slots of the armature are fully braced against relative movement, but,

a proper means are provided for bracing the projecting end portions outside the core, these portions are quite liable "to be distorted, on the occurrence of strains which may be due to the interaction of stray 'magnetic fields, or to one or more coils becoming short-circuited, or to any other cause.

It is anobject of this invention-to provide a supporting device for the projecting end portionsof the coils of a dynamo-electric, machine, which is simple in design and eflicient in operation.

, It is a further object ofthisinvention to provide, in a dynamo-electric machine, an

improved 'means for supporting and bracing the projecting end portions of coils disposed. on a stator core.-

These and otherobjects are attained by this invention, the various novel features of which will appear fromthe description and drawings, disclosing one embodiment of such invention, and will be particularly pointed out in the claims.

- In the accompanying drawings mFigure 1 is an end view of a dynamoelectric machine, of the rotating field alter nator type, with the end casing remojved.

Specification'of Letters Patent. Application filed October 8, 1914. Serial No. 866,135.

unless coin-END SUPPORT,

Patented Fence, 1920.

Fig. 2 is a vertical section on the line II-II of Fig. 1. Fig.3 is an enlarged View of the supporting means for coil ends, disclosed in Fig. 2. Fig. l is an enlarged development of a section taken on a conical surface on the line IV of Fig. 2. V. f"

Fig. 5 is a view similar to Fig. l, taken on the line V of Fig. 2. I

In the drawings, the invention is shown as applied to an alternatorhaving'a rotating field 8 and a stationary armature 9, the core of the armature being mounted in a frame 10. An end casing 11 serves to protectthe field 8 and the armature 9. The core laminations of the armature9 are held in place by an end plate 12 which is secured to the frame 10;

' Disposed in slots of the core of the armature 9 is a winding 13, of the distrib uted type and, as shown, arranged in two layers, this winding being preferably of the type in which one sidefof one coil is-disposed in the inner part of one slot and the other side is disposed in the outer part of another slot. :The layers of this winding, disposed in the inner and outer portions of the core slots, are indicated at .14 and 15, respectively, the layer 14 being disposed radially outward of the layer 15; The extending end portions of the winding are preferably bent back to some extent so as to provide space on the radially inner side thereof for the clamping nea'ns of thecoilend securing device used. The layer 1a of the winding 13, occupying the inner portion of the armature slots, is supported, at its radially outer side, by a-member 16, which is held in place by a plurality of spaced brackets 17, the member 16 being secured thereto through bolts 18. The bracket-s17 are secured, as by boltingor otherwise, to

ably in the form of a ring having a radially outer web portion 21, through whichthe -member is secured to the brackets 17, and a radially inner flange portion 22 against which. the radially outer layer 14; rests, The radially inner side of this flange portion 22 is provided with a plurality of spaced and parallelprojections 23, so disposed and of suchthic mess as to snugly fit between the adjacent end portions of the radially outer layer 14 of winding 13. These projections 23 are of such radial depth as to extend slightly beyond the radially inner side of the radially outer layer 14.

A second bracing and supporting element, 26, preferably in a plurality of segmental sections, and comprising a body portion 27 having a plurality of spaced parallel pro-,

jections28, is disposed radially inward of the member 16, the portions of the projections 23 that extend beyond the radially indisposed between the projections 23 of the member 16, and, following this step, sections 'of'the element 26 are placed in position with the ends of the projections in the recesses 29, and the end turns of the radially inner layer are properly disposed between the pro jections 28. When both layers of'windings are properly disposed in position between the projections of the members 16 and 26, the parts are clamped in position by means of the clamping ring 34: on the radially in ner'si'de of the radially inner layer 15 and bolts 35 which extend through this clamping I plate "and the flange portion 22 of the member 16, these bolts being disposed in the spaces'between adjacent projecting end turns of both layers.- Layers of insulating material 36 and 37 may be disposed between the web portion22 and the radially outer layer 14: and between the clamping band '34 and the radiallyinner layer 15, respectively. if desired, the portion 27 may be separated from'the two layers of winding through insulating sheets 38 and 39, preferably of a type that is somewhat yieldable. The winding maybe protected from the bolts 35 by providing insulating tubes 41 through. which these bolts pass.

It will be apparent that, when the end portions of the coils are properly disposed between the projections 28 on the member 16 and the projections 28 on the member 26, and the parts are clamped in position,

it through the bolts 85, against the ring memhere 16, which acts as an abutment, the coil ends of the outer layer are supported against any relative approach or separation, the coil 7 ends of the radially inner layer are similarly supported, and the coils of the two layers are also supported against any relative approach or separation, and, further, against any shearing movement of one layer relative to another. In fact, each separate coll-end 1s braced against any possible movement that might result from strains arising during the ordinary operation of the machine, or such as might result from short-circuiting one or more sections of the winding,

It will be obvious that, although the coilend securing means is specifically described struction shown-and described, for obvious modifications will occur toa person-skilled in the art. r

It is claimed and desired to secure by Letters Patent:

1. In a dynaino electric machine, a core, a winding disposed in a plurality of layers in slots in said core and extending beyond'the ends thereof, means for supporting said extending portions of said winding comprising a member fixed in position relatively to said core and having an abutment and spacjing and'bracing projections between which the extending portions or" the layer of-s'aid winding disposed at the inner part of said slots are positioned, a second member provided with spacing and bracing projections between which the extensions of the layer of said winding disposed atthe outer portion of said slots are positioned, and means for clamping said members together and the first layer of said winding against the abutment of said first member. a

2. In a dynamo-electric machine, a core, a winding disposed in a plurality of layers in slots in said core and extending beyond an end thereof, a member fixed in j position relatively to said core and provided with parallel spacing and bracing projections dis posed between the extending portions of the layer of winding at the inner part of said slots, a second member recessed to receive the extending portions of said first member and provided with parallel spaced projections disposed between theextending portions of the layer of winding at the outer part of said slots, and means for clamping said members together and securing the extending portions .of'the-layers of said winding in position.

3. In a dynamo-electric machine, a stator core, a'wmdl'ng disposed 1n a plurality of layers 111 slots in said core, means for supporting the extendingend'po-rtions of said layers of winding comprising an abutment member fixed in position and provided with spaced projections disposed between adj acent end'portlons of the radially outer layer of saidwinding, a member provided with spaced projections disposed between adjacent end portions of the radially inner. layer of said Winding, and means for securing said members together and said end portions 7 thereto;

a portion of. thelprojections of said first member and providedwith radially inward extendingspaced projections between which the end extensions of the radially inner layer of said winding are received and clamping means for securing said memberstogether and said end extensions vin position relatively thereto. I a 5. A coil end support comprising a member provided with projections forming recesses therebetween for the reception of the end extensions of a layer of conductors, and a second member.- recessed on one side for the reception of the projections of said first member and provided on its opposite side with spaced projections forming recesses, therebetween for the reception of the end extensions of a second layer of conductors,

a plate adapted to bear on'the exposed side of said second layer of conductors, and

. means for securing said plate and said members together and said end extensions in fixed position relatively thereto.

6. Inadynamo-electric machine, a core, a Winding disposed in a plurality of layers in slots in said core and extending beyond the ends thereofi'the extending end portions of the several layers being disposed along separate concentric, conical surfaces, and means for supporting and bracing said extending portions of said winding comprising a memher having spacing and bracing projections between which'the extending portions of one layer of said winding are disposed'and a second member interlocked with said first member and provided with spacing and" bracing projections between which, the extending portions of another layer of said winding are positioned. v v

7. A coil-end support for windings of the type having coil ends disposed inlayers,

'fcomprising a plurality of members havmg transverse projections adapted to be disposed between the coil ends of said layers a respectively, certain of said members being provided with recesses adapted to receive 1 the projections oncertain of the other members, and means for clamping said members and said coil endstogether;

In testimony whereof the signature-of the inventor is aflixed hereto the presence of two WItHGSSGS." a

Witnessesi J, J. KANE, W. H. LIEBER.

'RO ERT'BL WILLIAMSON. I 

